Cold storage server

ABSTRACT

A server can be used for a cold storage application. The server can comprise a nest for holding a high density of bare storage drives, wherein the nest comprises a plurality of drive cooling channels residing on the underside of the nest. The server can further comprise rear, front, and side air flow paths for natural convection cooling.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication No. 62/305,484, filed on Mar. 8, 2016, titled “COLD STORAGESERVER,” the entirety of which is incorporated by reference.

BACKGROUND

Technical Field

Certain embodiments disclosed herein relate generally to high densityservers, such as rack mounted servers for cold storage of data.

Description of the Related Art

Rack mountable servers are generally shaped and sized based on industrystandards. For example, a standard server-rack configuration (one rackunit or “1U”) is 19 inches (480 mm) wide and 1.75 inches (44 mm) tall.The most common computer rack form-factor is 42U high, which can receiveup to 42 discrete computer devices that are directly mountable in therack.

To maximize storage capacity of certain servers, rack mountable orotherwise, disk drives are tightly packed side by side within anenclosure. A 1U server hosting either eight (8×) or twelve (12×) diskdrives is an example of a densely packed storage server. Such a serverhas very little space for air movement between each disk drive. Thus, itwill be understood that placing a large number of disk drives closetogether can introduce cooling issues.

BRIEF DESCRIPTION OF THE DRAWINGS

Various embodiments are depicted in the accompanying drawings forillustrative purposes, and should in no way be interpreted as limitingthe scope of the inventions.

FIG. 1 shows an exploded view of certain chassis components of a server.

FIG. 2 illustrates an assembly procedure of the server.

FIG. 2A shows a detail view of a storage drive and a portion of printedcircuit board.

FIG. 3 is a perspective view of a nest configured to receive andproperly position storage drives within the server.

FIG. 4 is a bottom perspective view of the nest illustrating the coolingchannels.

FIGS. 5 and 6 are cross-sectional views of the server with a schematicrepresentation of air flow through the server.

FIGS. 7 and 8 show some of the airflow entry points on the server.

FIG. 9 is a top perspective view of a partially disassembled serverillustrating the arrangement of storage drives within the serverchassis.

FIGS. 10A and 10B illustrate datums of the nest.

FIG. 11 shows the securement of the storage drives within the server, aswell as the spacing for airflow above the storage drives.

FIG. 12 is a detail view of the printed circuit board and storagedrives.

FIGS. 13A-14 illustrate the securement of the storage drive retainingcover.

DETAILED DESCRIPTION

To maximize storage capacity of certain servers, storage drives aretightly packed side by side within an enclosure. Placing a large numberof storage drives close together can introduce cooling issues. Manyservers utilize forced convection cooling systems to remove the heatfrom disk drives and controlling electronics. Such cooling systems aredesigned to move a large volume of air across or throughout the serverin order to remove the heat energy created by the operation of theserver.

Effective air flow mass movement generally requires open spaces (lowimpedance) between and around storage drives and surrounding electronicsthroughout the server. At the same time, it is desirable to have sizeefficient enclosures where the volume and footprint of the enclosure areminimized as much as possible. In many cases, the necessity of openspace limits the overall server storage density within a givenvolumetric space of the server.

A 1U server hosting either eight (8×) or twelve (12×) disk drives is anexample of a densely packed storage server having very little space forair movement between each storage drive.

In some applications, servers are used for cold storage of data (e.g.,data that is inactive for extended period of time). Cold storage dataservers are typically used for backups, archiving, and multimediaapplications. Cold storage is the retention of data that is accessedinfrequently. For example, cold storage of data may include activatingless than 5 to 10% of the disk drives at any one time during dataaccess. Stated differently, during access of cold storage data, 90 to95% of the disk drives remain inactive.

The servers can be placed in a refrigeration room to reduce the heat ofthe server, including generally reducing the need for fans (in the room,on the rack, on the server, etc.). Though room refrigeration can reducethe individual cooling needs for each server, high storage density canstill create heating issues. A cold storage facility for cold storageservers can be an air conditioned room or free air room sufficient tocool the servers. A cold storage facility can use ice blocks to cool theservers.

As an example, the servers will preferably be high storage densityservers containing data that is archived as it is rarely accessed. Sucharchive storage can include powering only a data storage device requiredfor an active request for data. For example, the Open Computespecification calls for an Open Vault tray of fifteen (15×) data storagedevices. One or a few data storage device(s) in the tray is powered at atime to reduce power, heat, and vibration. However, because one or a fewdata storage device(s) is powered at a time, the other inactive datastorage devices may include components which are not simultaneouslyneeded or utilized, and may therefore be redundant while consumingexcess power.

One way in which heating issues of a high storage density server can bereduced is to connect multiple bare data storage devices to a commoncontroller printed circuit board assembly (pcba). As used herein, baredata storage devices are data storage devices without a dedicatedcontroller pcba. A bare data storage device can be a conventional drive,such as a hard disk drive (HDD), solid state drive (SSD), solid statehybrid drive (SSHD), a storage drive, or other storage device known inthe art. Certain examples of a data storage assembly that can use acommon controller pcba to control multiple bare data storage devices canbe found in U.S. Pat. No. 8,947,816, incorporated by reference hereinand made a part of this specification.

Looking now to FIG. 1, an exploded view of a server 100 is shown. Theserver 100 as shown has a high storage density, with fifteen (15) baredisk drives 2 connected to a single controller pcba 4. In theillustrated embodiment, the server 100 is a high density, cold storageserver with a chassis design that can accommodate up to fifteen (15×)3.5 inch form factor disk drives 2 inside the chassis. It will beunderstood that, in other embodiments, two or more bare storage drives 2can be connected to a single controller pcba 4 within a chassis. Theserver 100 is preferably configured for cold storage use, though theprinciples discussed herein can also be applied to other applications.

The illustrated chassis form factor adheres to the Facebook OpenArchitecture Design Guidelines (21.12 inch (536.5 mm)×1.75 inch (44.5mm)×27.39 inch (695.6 mm)), although a similar chassis architecturecould be applied to a standard 1U form factor rackmount server (19.0inches (480 mm)×1.75 inches (44.5 mm)×26.4 inch (670 mm)), but hostingtwelve (12×) or sixteen (16×) 3.5 inch form factor drives. In addition,in some embodiments using an Open Architecture Design or a 1U (or1U-like) form factor, up to 20 disk drives could be positioned withinthe server.

In some embodiments, the derived 1U chassis server design can be used tobuild a cold storage server and take advantage of disk drives withShingle Magnetic Recording (SMR) drive technology. The SMR drivetechnology along with the capability to spin down and up an individualdrive among many drives can be a very cost effective technology for coldstorage applications.

As illustrated in FIG. 1, a server 100 can include a bottom chassis 6(e.g., a bottom of the chassis), a chassis cover 8 (e.g., a top of thechassis) and a front cover or face plate 10. As will be understood, theserver 100 can have any number of different chassis designs. The chassiscan be an enclosed chassis as shown, but can also be open on the top,bottom, back, front, and/or on one or more of the sides. As shown, theserver 100 also includes a nest 12 configured to receive and properlyposition the bare storage drives 2 within the server 100. Fifteen (15)bare disk drives 2 are shown, though a plurality of storage drives 2that are the same or different, and that are bare or have dedicatedpcbas could be included in the server.

The server 100 can be rack mountable (such as with additional hardware)or standalone. The server 100 can hold the storage drives 2 organizedinto rows and columns. Other configurations can also be used where thestorage drives 2 do not need to be symmetrically organized or evenlyspaced and positioned as in the illustrated embodiment.

A single controller pcba 4 is shown designed to control the fifteen (15)bare disk drives 2. A retaining cover 14 is also shown that can be usedto secure the storage drives 2 in the server 100.

A computer module 16 is also shown. It will be understood that theserver 100 can include any number of different features such as thecomputer module 16, but also one or more of a power supply, bus, fan,storage drive, printed circuit board(s) (central processing unit (CPU),input/output (I/O) board, memory modules), etc.

Looking to FIG. 2, an assembly procedure of the server 100 is shown. Thenest 12 can be placed within the bottom chassis 6. The front cover 10may also be connected to the bottom chassis. With the nest 12 in place,the internal electronics can be positioned within the chassis. This caninclude the storage drives 2, as well as other electronics such as acomputer module 16 and the power connections 18 shown at the back of thechassis. As will be explained in more detail below, the nest 12 canreceive and properly position storage drives 2 within the server 100.This becomes significant as the single controller pcba 4 designed tocontrol the storage drives 2 also needs to connect to each of them.Thus, the electrical pins 20 and connectors 22 between them (FIG. 2A)have to be precisely positioned to line up to allow for quick and simpleconnection without damaging them. It will be understood that harnessesand wires can be used to simplify the connection process, but this canalso increase the material cost and potentially decrease the amount ofspace available in the server for other components and/or block air flowthrough the server. Thus, as shown, an electrical pin 20 or connector 22on the storage drive 2 can directly connect to a correspondingelectrical pin 20 or connector 22 on the controller pcba 4. This can bedone without the use of wires positioned between the electrical pins andconnectors. The controller pcba can then be secured to the storagedrives with the use of fasteners 24.

In the illustrated embodiment, only fourteen (14) storage drives 2 areshown, with one open space in the nest being illustrated. It will benoted that typically all spaces of the nest will be full, though someembodiments may have fewer than all spaces with a corresponding storagedrive.

Once the controller pcba 4 is in place, a retaining cover 14 can be usedto secure the storage drives 2 in the server 100 and then a chassiscover 8 can be secured in place as shown in FIG. 2.

Moving now to FIGS. 3-8, a low cost and improved air flow managementscheme is described. The air flow management scheme can be used toprovide air flow around each drive in a densely packed server chassis,as well as other styles of servers and computers. It can also be usedfor cooling within other types of electronic devices, to cool othertypes of electronic components, not limited to storage drives.

In FIGS. 3 and 4, perspective views of a nest 12 configured to receiveand properly position storage drives 2 within the server 100 are shown.The nest 12 can include a plurality of storage drive receiving areas orbays 26. Each storage drive receiving area 26 can be configured toreceive a corresponding storage drive 2. As shown, the nest 12 includesfifteen (15) storage drive receiving areas 26. Any number of storagedrive receiving areas can be used based on the desired storage densityand capacity of the server, among other considerations.

In FIG. 4, cooling channels 28, 30 (e.g., air channels) in the bottom ofthe nest can be seen. The server can be designed to allow for air flowaround the storage drives, such as under and above the storage drives.As shown, the nest can include main air channels 30 that extend fromfront to back. The main air channels 30 can be interconnected with sidechannels 28 that extend from side to side. As illustrated, the nestincludes five (5) main air channels 30 and three (3) side channels 28.The number of main and side air channels can correspond with the numberof rows and columns of storage drive receiving areas 26 to maximizecooling of each storage drive 2. In some embodiments, the nest caninclude main channels 30 without side channels 28 or include sidechannels 28 without main channels 30. For example, if the server asdisclosed herein incorporates a fan for forced air convection cooling,then the nest may include a certain number of main channels 30 withoutside channels 28 while achieving desired cooling of the servers bydirecting the forced air through the main channels 30 and minimizing airleakage that may occur through the side channels 28 when air is moved bya fan from one side to another of the server.

The nest 12 also has large cutouts 32 at each storage drive receivingarea 26. This can increase the cooling of each storage drive as more ofits surface area is exposed and can be cooled through air flow.

The cutouts 32 can create an air passageway to allow a flow of air toaccess the bottom of a storage drive 2. Channeling air directly to thebottom of the storage drive 2 can increase cooling in an efficientmatter.

According to some embodiments, the cutout 32 can have a footprint on thenest 12 smaller than a footprint 34 of the storage drive 2 on the nest(see FIG. 3). This can help ensure proper air flow through the cutoutwhen a storage drive is positioned at the storage drive receiving area.In some embodiments, the storage drive can close or prevent access tothe cutout from a top of the nest. In some embodiments, the storagedrive can effectively seal off access to the top of the cutout. In otherembodiments, air can flow into and out of the cutout from both the topand bottom of the nest. Though, it will be understood that preferably,the primary air flow into and out of the cutout comes from under thenest as discussed herein.

A nest 12 can be used to form a bottom of one or more of the storagedrive receiving areas 26. The nest can be positioned between the top 8and bottom 6 of the chassis enclosure and establish an air channelbetween the nest and the bottom surface of the chassis. For example, anair channel 28, 30 can be formed in the bottom of the nest. The nest canbe placed on the bottom surface of the chassis to establish air channelson the bottom of the server as shown in FIGS. 5 and 6. It will beunderstood that the nest can also connect to the chassis in other waysto create an air channel.

FIGS. 7 and 8 show some of the airflow entry and exit points or openings36, 38 of the server. Air flow cooling paths (represented by arrows)show air flowing into the front grill 36 and the side ventilation holes38 to the back of the server. As the illustrated embodiment does notinclude a cooling fan, the air flow will be controlled by other sourcesoutside of the server and can have other flow paths through the server.The server design as shown is optimized for natural convection cooling.

Air can flow above and below the storage drives 2 and storage drivereceiving areas 26. As will be described in more detail below, theretaining cover 14 can be positioned above the storage drives 2 to allowair flow therebetween. The chassis cover 8 can also be positioned abovethe retaining cover 14 to allow air flow between the two covers. It willbe understood that, in some embodiments, the retaining cover 14 candirectly contact the storage drives 2 so that little to no air caneffectively flow between them. The relationship between the retainingcover 14 and chassis cover 8 can be positioned likewise.

In some embodiments, the server chassis can be size efficient per thetype of storage drive. Thus, even with the air channels, a height of theserver chassis defined by the distance from the top wall to the bottomwall of the enclosure can be less than two times a height of a storagedrive to be received within the enclosure. In other embodiments, it canbe less than 1.5, 1.6, 1.7, 1.8, or 1.9 times. Put another way, theheight of the storage drive can be 40%, 50%, 60%, 70%, 80%, or 90% ofthe height of the enclosure. In some embodiments, the height of thestorage drive can be between 40% and 80%, 50% and 70%, 55% and 65% ofthe height of the enclosure.

Turning now to FIGS. 9-13, the positioning of the storage drives 2within the server will now be described. FIG. 9 shows a top perspectiveview of a partially disassembled server illustrating the arrangement ofstorage drives 2 within the server chassis. As can be seen, in someembodiments, the storage drives 2 can be organized in rows and columns.The storage drives can face the same direction or different directions.As shown, the first row of storage drives 2 faces a different directionthan the second and third row of storage drives, as represented by thearrows.

FIGS. 10A and 10B illustrate a number of datums of the nest (e.g.,points of contact with features, sections, portions, or parts of thenest) (see also FIG. 3). The nest receives and positions storage driveswithin the server. As has been mentioned, using a single controller pcbato control the storage drives will include the storage drives connectedto the single controller pcba. Controlling the accuracy of the size andplacement of the datums in the nest can help control the connection ofthe single controller pcba to multiple storage drives. Thus, theelectrical pins and connectors between them can be precisely positionedto line up to allow for quick and simple connection without damaging theconnections. An electrical pin or connector on the storage drive 2 candirectly connect to a corresponding electrical pin or connector on thecontroller pcba 4. This can be done without the use of wires positionedbetween the electrical pins and connectors.

In the illustrated storage drive receiving area 26, there are a numberof datums 40, 41, 42, 43, 44, 46, 48, 50, 52 used to control thepositioning of the storage drive. The datums can be used to position thestorage drive in one or both of the X and Y axes as also illustrated inFIGS. 10A and 10B. Thus, datums 41, 42, 43, 44 can position the storagedrive along the Y axis, while datums 46, 48, 50, 52 can position thestorage drive along the X axis. The datums 41, 42, 43, 44, 46, 48, 50,52 extend along the Z axis as illustrated to, for example, at leastpartially define the receiving area 26 and position the storage drivesas desired. In some embodiments, each storage drive receiving area in arow of the nest can use datums that are aligned along the row. Thus forexample, each storage drive receiving area can have three datums thatare in the same relative location to the other storage drive receivingareas in the row. It will also be understood that this may be the casefor all of the storage drive receiving areas in the nest, but certainsections, such as entire rows, may have different datums as compared toother sections. It will be understood that more or fewer datums can beused to position a storage drive within the storage drive receiving area26. In some embodiments, five or more datums are used (two or more forthe X axis and two or more for the Y axis).

The datums can be used to position the storage drive in the Z axis asillustrated in FIGS. 10A and 10B (see also FIG. 3). Datums 40, 45, 47can position the storage drive in the Z axis. For example, datums 40,45, 47 can determine where along the Z axis the storage drive issituated in the receiving area 26. While three datums 40, 45, 47 areused the establish the plane up to which a surface (e.g., bottomsurface) of the storage drive is positioned along the Z axis, any numberof datums can be used to position the storage drive along the Z axis,such as four or more. As illustrated, datums 40, 45, 47 extend along theX and Y axes into the receiving area 26 to elevate the storage driveabove surfaces of the nest 12 circumscribing the cutout 32.

Once the controller pcba 4 is in place on the storage drives 2, with thepins and connectors connected, screws or other fasteners can be used tosecure the controller pcba in place. In some embodiments, 7 to 10 screwsare used to connect each storage drive to the controller pcba. Thescrews can help ensure that the storage drives and controller pcba stayproperly aligned.

With the controller pcba 4 in place, a retaining cover 14 can be used tosecure the storage drives and controller pcba in the server. FIGS.11-13B show the securement of the storage drives 2 within the server100, as well as the spacing for airflow above the storage drives.

In FIG. 11, the cross-section of the server shows the mountingarrangement of the storage drive. A fastener 54, such as a screw 54,secures the retaining cover 14 to the storage drives 2. The fastener 54may also secure the retaining cover 14 to the controller pcba 4. Thefastener 54 may also secure the retaining cover 14 to the controllerpcba 4 and the storage drives 2. In the illustrated embodiment, spacers56 are also provided to maintain a space between the bottom of theretaining cover and the top of the controller pcba. This can allow airto flow through the space to help with cooling. The spacers 56 can beconductive to help transfer heat from the storage drives 2 and/orcontroller pcba 4 to the retaining cover 14. The large surface area ofthe retaining cover can help to more quickly dissipate heat. In someembodiments, the retaining cover and the spacers can be made of metal.The controller pcba can include a copper or other conductive trace wherethe spacer contacts the controller pcba. The controller pcba can alsoinclude copper or other conductive traces that contact conductivesurfaces of the storage drive. Thus, heat can be transferred from thestorage drive to the controller pcba, then to the spacer, and then tothe retaining cover. The fastener can also be used to transfer heat fromthe storage drive to the retaining cover. In some embodiments, the heatcan be further transferred to the chassis cover. In some embodiments,the retaining cover can contact the controller pcba and/or storagedrives without the need for spacers. In some embodiments, the retainingcover can include embossing to create dimples for contact with thecontroller pcba while still allowing for airflow between the controllerpcba and the retaining cover.

In some embodiments, the air space between the pcba and the retainingcover can be larger than the thickness of the controller pcba, such astwice as thick.

Looking now to FIG. 12, in some embodiments, the controller pcba 4 caninclude a cutout 58. The cutout 58 can allow the spacers 56 to directlycontact the storage drives 2 without contacting the controller pcba, orwithout having the controller pcba being between the storage drive andthe spacer. It is typical for a storage drive 2, such as a disk drive,to include a metal frame 60. The spacers 56 can contact the metal frame60 with the fasteners 54 threadedly received into the metal frame 60.The metal frame 60 can also establish a datum plane. Thus, the spacers56 in contact with the datum plane of the storage drive can provide aconsistent space between the storage drives 2 and the retaining cover14.

Any number of fasteners 54 can be used to secure the storage drives 2and retaining cover 14. In the illustrated embodiment, four (4)fasteners 54 are used to secure each storage drive 2 to the retainingcover. Looking to FIG. 13A and to the corresponding detail view of FIG.13B, six (6) fasteners 54 are shown. The four (4) fasteners on the rightside can be used to secure a single storage drive and the two (2)additional fasteners 54 on the left can be used to secure a secondstorage drive.

As shown in FIGS. 13A and 14, the storage drive retaining cover 14 canbe secured to the chassis 6. The chassis cover 8 can then be secured inplace. The storage drive retaining cover 14 is shown with attachmentpoints at the rear, sides, and front, though it will be understood thatmore or fewer attachment points can be used.

As discussed herein, a chassis architecture can be a high density serverto accommodate eight, twelve, fifteen, sixteen, twenty, or a differentnumber of storage drives such as disk drives. Among other benefits, theserver can provide for drive attachment and clamping, drive registrationand alignment, drive cooling, controller size optimization and diskdrive arrangement inside the chassis, and optimized natural convectioncooling.

In some embodiments, a server can beneficially provide ultra-highdensity server capacity (e.g., 15 drives), highly integrated design(e.g., common controller), and optimized natural convection cooling.

In some embodiments, a mechanical chassis architecture can be used for acold storage server comprising a 1U type form factor adhering to theFacebook Open Architecture Design Guidelines. The mechanical chassisarchitecture can comprise a nest for holding up to 15 bare drives,wherein the nest comprises a plurality of drive cooling channelsresiding on the underside of the nest, the mechanical chassisarchitecture further comprising rear, front, and side air flow paths toallow for natural convection cooling.

According to some embodiments, a server can comprise a chassis, aplurality of disk drives, a nest, a printed circuit board (pcb), aretaining cover, a plurality of fasteners and a plurality of spacers.The nest can be positioned within the chassis and having a plurality ofbays, each disk drive of the plurality of disk drives positioned withinone of the bays of the plurality of bays. The printed circuit board canbe a single pcb that is physically and electrically connected to all ofthe disk drives of the plurality of disk drives. The retaining cover cansecure the plurality of disk drives within the chassis. Each spacer ofthe plurality of spacers can be positioned on one of the fasteners ofthe plurality of fasteners, the spacers maintaining a gap between a topof the single printed circuit board and a bottom of the retaining cover,each spacer being in contact with a disk drive of the plurality of diskdrives and the retainer cover so that heat may be transferred from thedisk drive to the retainer cover.

In some embodiments, the nest comprises a plurality of air channels, andeach bay of the plurality of bays comprises a cutout in fluidcommunication with at least one of the plurality of air channels tothereby provide cooling to a bottom of a disk drive. Each bay caninclude at least three (e.g., three, four, or more) datums configured toposition the respective disk drive within the bay. The bays can beorganized in rows and columns. According to some embodiments, in atleast one pair of a first row adjacent a second row, the respective baysof the first row are mirror images of the bays of the second row.

The server can also include a plurality of electrical pins andconnectors, each of the electrical pins being on the printed circuitboard or one of the hard disk drives and connected to one of theelectrical connectors on the other of the printed circuit board or oneof the hard disk drives. The server may further be part of a datastorage system with a plurality of the servers and a fan, wherein eachserver does not include a dedicated fan.

In some embodiments, a cold storage server can comprise a chassis, aplurality of hard disk drives, a nest, a printed circuit board, aretaining cover, a plurality of fasteners and a plurality of spacers.The nest is positioned within the chassis and having a plurality ofbays, the bays being organized in rows and columns and each hard diskdrive of the plurality of disk drives positioned within one of the baysof the plurality of bays. The pcb can be a single printed circuit boardphysically and electrically connected to all of the hard disk drives ofthe plurality of hard disk drives. The server can also include aplurality of electrical pins and connectors. Each of the electrical pinsbeing on the printed circuit board or one of the hard disk drives andconnected to one of the electrical connectors on the other of theprinted circuit board or one of the hard disk drives. The retainingcover can secure the plurality of hard disk drives within the chassis.Each spacer of the plurality of spacers can be positioned on one of thefasteners of the plurality of fasteners, the spacers maintaining a gapbetween a top of the single printed circuit board and a bottom of theretaining cover, each spacer being in contact with a hard disk drive ofthe plurality of disk drives and the retainer cover so that heat may betransferred from the hard disk drive to the retainer cover.

Although this invention has been disclosed in the context of certainpreferred embodiments and examples, it will be understood by thoseskilled in the art that the present invention extends beyond thespecifically disclosed embodiments to other alternative embodimentsand/or uses of the invention and obvious modifications and equivalentsthereof. In addition, while a number of variations of the invention havebeen shown and described in detail, other modifications, which arewithin the scope of this invention, will be readily apparent to those ofskill in the art based upon this disclosure. It is also contemplatedthat various combinations or sub-combinations of the specific featuresand aspects of the embodiments may be made and still fall within thescope of the invention. Accordingly, it should be understood thatvarious features and aspects of the disclosed embodiments can becombined with or substituted for one another in order to form varyingmodes of the disclosed invention. Thus, it is intended that the scope ofthe present invention herein disclosed should not be limited by theparticular disclosed embodiments described above, but should bedetermined only by a fair reading of the claims that follow.

Similarly, this method of disclosure, is not to be interpreted asreflecting an intention that any claim require more features than areexpressly recited in that claim. Rather, as the following claimsreflect, inventive aspects lie in a combination of fewer than allfeatures of any single foregoing disclosed embodiment. Thus, the claimsfollowing the Detailed Description are hereby expressly incorporatedinto this Detailed Description, with each claim standing on its own as aseparate embodiment.

What is claimed is:
 1. A cold storage server comprising: a chassis; aplurality of disk drives; a nest positioned within the chassis andhaving a plurality of bays, each disk drive of the plurality of diskdrives positioned within one of the bays of the plurality of bays; asingle printed circuit board physically and electrically connected toall of the disk drives of the plurality of disk drives; a retainingcover to secure the plurality of disk drives within the chassis; aplurality of fasteners; and a plurality of spacers, wherein each spacerof the plurality of spacers is positioned on one of the fasteners of theplurality of fasteners, the spacers maintaining a gap between a top ofthe single printed circuit board and a bottom of the retaining cover todissipate heat, each spacer being in contact with a disk drive of theplurality of disk drives and the retainer cover and configured totransfer heat from the disk drive to the retainer cover.
 2. The serverof claim 1, wherein: the nest comprises a plurality of air channels; andeach bay of the plurality of bays comprises a cutout in fluidcommunication with at least one of the plurality of air channels tothereby provide cooling to a bottom of the respective disk drive.
 3. Theserver of claim 1, wherein the single printed circuit board ispositioned above the plurality of disk drives such that each of theplurality of disk drives are sandwiched between the single printedcircuit board and the nest.
 4. The server of claim 1, wherein: theserver is a one rack unit (1U) server configured for cold storage ofdata; and the plurality of disk drives comprises fifteen (15) diskdrives.
 5. The server of claim 1, further comprising a computer module.6. The server of claim 1, wherein each bay of the plurality of bayscomprises at least three datums configured to position the respectivedisk drive within the bay.
 7. The server of claim 1, wherein: the baysare organized in rows and columns; and in at least one pair of a firstrow adjacent a second row, the respective bays of the first row aremirror images of the bays of the second row.
 8. The server of claim 7,wherein the nest comprises a plurality of air channels with one airchannel corresponding with each row of bays and one air channelcorresponding with each column of bays.
 9. The server of claim 8,wherein each bay of the plurality of bays comprises a cutout in fluidcommunication with the respective air channel corresponding with the rowand the respective air channel corresponding with the column, the cutoutconfigured to provide cooling to a bottom of the respective disk drivein the bay.
 10. The server of claim 1, further comprising a plurality ofelectrical pins and connectors, each of the electrical pins being on thesingle printed circuit board or one of the disk drives and connected toone of the electrical connectors on the other of the single printedcircuit board or one of the disk drives.
 11. A data storage systemcomprising: a plurality of servers of claim 1; and a fan, wherein eachserver does not include a dedicated fan.
 12. A server comprising: achassis; a plurality of hard disk drives; a nest positioned within thechassis and having a plurality of bays, the bays being organized in rowsand columns and each hard disk drive of the plurality of hard diskdrives positioned within one of the bays of the plurality of bays; aprinted circuit board physically and electrically connected to the harddisk drives of the plurality of hard disk drives; a plurality ofelectrical pins and connectors, each of the electrical pins being on theprinted circuit board or one of the hard disk drives and connected toone of the electrical connectors on the other of the printed circuitboard or one of the hard disk drives; a retaining cover to secure theplurality of hard disk drives within the chassis; and a plurality ofspacers maintaining a gap between a surface of the printed circuit boardand a surface of the retaining cover, each spacer being in contact witha hard disk drive of the plurality of hard disk drives and the retainercover and configured to transfer heat from the hard disk drive to theretainer cover.
 13. The server of claim 12, wherein: the nest comprisesa plurality of air channels; and at least some of the plurality of bayscomprise a cutout in fluid communication with at least one of theplurality of air channels to thereby provide cooling to a surface of therespective hard disk drive.
 14. The server of claim 12, wherein: theserver is a one rack unit (1U) server configured for cold storage ofdata; and the plurality of hard disk drives comprises at least twelve(12) hard disk drives.
 15. The server of claim 12, wherein each bay ofthe plurality of bays comprises at least three datums configured toposition the respective hard disk drive within the bay.
 16. The serverof claim 12, wherein in at least one pair of a first row adjacent asecond row, the respective bays of the first row are mirror images ofthe bays of the second row.
 17. The server of claim 16, wherein the nestcomprises a plurality of air channels with one air channel correspondingwith each row of bays and one air channel corresponding with each columnof bays.
 18. The server of claim 17, wherein each bay of the pluralityof bays comprises a cutout in fluid communication with the respectiveair channel corresponding with the row and the respective air channelcorresponding with the column, the cutout configured to provide coolingto a surface of the respective hard disk drive in the bay.
 19. A datastorage system comprising: a plurality of servers of claim 12; and afan, wherein each server does not include a dedicated fan.
 20. A servercomprising: a chassis; a plurality of disk drives; and a nest positionedwithin the chassis, the nest comprising: a plurality of bays, each diskdrive of the plurality of disk drives positioned within one of the baysof the plurality of bays; a plurality of cutouts, each cutout of theplurality of cutouts in one of the bays of the plurality of bays; and aplurality of air channels, each air channel of the plurality of channelsin fluid communication with at least one of the plurality of cutouts toprovide cooling to the respective disk drive.